matter
everything
states of matter
solid liquid gas plasma
10 Must-Have Accessories for Sprucing Up Your Caravan
homogeneous
uniform throughout
heterogeneous
not uniform throughout
law of constant composition
all samples of a given chemical compound have the same elemental composition by...
10 must have accessories for sprucing up your cara
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Chem 101 Drexel
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Chem 101 Drexel Final GRADE A+
GURANTEED CORRECT
matter
everything
states of matter
solid liquid gas plasma
10 Must-Have Accessories for Sprucing Up Your Caravan
homogeneous
uniform throughout
heterogeneous
not uniform throughout
law of constant composition
all samples of a given chemical compound have the same elemental
composition by mass
law of multiple proportions
elements combine in small whole number ratios to form compounds
law of conservation of mass
total amount of mass remains constant
Dalton's law
in a mixture of non-reacting gases, the total pressure exerted is
equal to the sum of the partial pressures of the individual gases
structure of the atoms
Atoms consist of electrons surrounding a nucleus that contains
protons and neutrons
electrons
negative subatomic particles surrounding the nucleus in a cloud
neutrons
non-charged subatomic particle in the nucleus
protons
positive charged subatomic particle in the nucleus
atomic number
the number of protons
mass number
the total number of protons and neutrons
isotopes
different mass number, becasue thenumber of nucleons (both protons
and neutrons) in the nucleus is the atom's mass number
atomic mass units
a unit of mass used to express atomic and molecular weights
atomic weight
, the average of the isotope weights weighted for the isotope
distribution
mass spectrometer
an instrument which can measure the masses and relative
concentrations of atoms and molecules
cathode tube experiment
a phosphor-coated glass tube from which the air has been removed, two
electrodes, negative electrode, positive electrode. When a high
voltage electrical current is applied between the electrodes, a
cathode ray travels from + to -, produces green light, discovered
electrons
oil drop experiment
measured the charge of an electron using oil and 2 pieces of metal
scattering of alpha particles
projected alpha particles against hydrogen protons, learned about the
structure of atoms
mass to moles
divide by molar mass
moles to mass
multiply by molar mass
moles to molecules
multiply by avogadro's number
molecules to moles
divide by avogadro's number
accuracy
closeness of a measured value to a standard or known value
precision
closeness of two or more measurements to each other
intensive properties
doesn't change when you take away some of the sample
extensive properties
changes when the size of the sample changes
potential energy
has the potential to be converted into other forms of energy
kinetic energy
energy an object possesses due to its motion
work
energy required to move an object against a force (joule)
avogadro's number
6.022×10^23
moles
substance is called the molar mass of that substance
sig figs
how many digits you use, and how to round correctly
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